GS	ALI	LI
eps : 1.e -1 -2 -3 -4 -5 -6 -7 -8 -9 -10 -11 -12	taumax : 1.e 4 5 6 7 8	npdec :  4 6 8 10 12
niter () :	omega :	Run

Companion article : Lambert, J., Paletou, F., Josselin, E. & Glorian, J.-M.,
Numerical radiative transfer with state-of-the-art iterative methods made easy (accepted for Eur. J. Phys )
You can download the python files and documentation here